Omg! I am not the only one. I have 3 9 mon old pekin drakes big guys well one day out of the blue one get this named Bitsy started biting my toes and chasing me at first it was funny seeing this little guy stomping as hard as he could after me ha jokes on me because it be came down right ridiculous I couldn't walk any where with out him doing this and the pinches got harder and left bruises a month later Aflac started same thing between 3-4 mons of age herman never does this hes really sweet. well I hate to tell u 5 months later their still going strong someone suggested getting them a ball maybe they were bored ha this highly insulted Bitsy. Here's my theory I think they really love me and getting rid of them is not an option mostly I deal with it but there is some hope first of all they need to no this is unacceptable like other post suggested holding their beak for a second with a firm no! When that doesn't work i pick whoevers the most aggressive up gently and hold them telling them no and talking calmly till he can't stand anymore this seems to work well it's like it wounds his tough pride a bit. I have gotten 8 hens in past few months to keep them occupied its never really good to have to many drakes without hens but my hens are still young and will never be housed with them for the girls safety. Here's my best discipline yet the past week when I pay no attention to their harassing easy to do now its wintertime and I'm not wearing shorts and flip flops they start harassing hens and looking at me to get my attention I promptly tell them no and the two go back to their lot for 10 mins. Of timeout well this really gets their goat after time out they come out and play nice with everyone till next day lol I'm no expert but be persistent and hopefully they'll calm down.